You win some, you lose some. And with dozens of business pitches over the first three seasons of ABC's wildly popular Shark Tank, the investors are bound to have varied results.

Here, we take a look at some of the most successful startup pitches, like Ava the Elephant, a medicine dispenser from the premiere episode, that has since seen over $1 million in sales. We also highlight some of the flops, including Body Jac, a fitness device that Barbara Corcoran calls her "worst investment."

Daisy Cakes

Airdate: April 22, 2011Deal: Corcoran paid $50,000 in exchange for a 25 percent stake and $1 for each of the first 50,000 cakes sold.Result: $50,000 paid back within three months. Daisy Cakes has sold more than 10,000 cakes per month since airdate. (Prior to that, it sold 1,000 cakes over two years.)

I Want to Draw a Cat For You, an online cartoon service

Airdate: Jan. 27, 2012Deal: Cuban paid $25,000 for a 33 percent stake. (John regrets not going in on this one.)Result: 8,930 cats drawn and counting, at $9.95 apiece. ($9 of that is profit.)

Chordbuddy, a guitar-learning device

Airdate: Feb. 3, 2012Deal: Herjavec paid $125,000 for a 20 percent stake, plus another $50,000 for an infomercial to promote the product.Result: Sales of $500,000 within two weeks of airing.

Talbott Teas

Airdate: Feb. 17, 2012Deal: O'Leary paid $250,000 for a 35 percent stake. John came in later after extricating himself from a deal with another tea-related company and provided an intro to Jamba Juice.Result: Jamba Juice acquired Talbott Teas for an undisclosed sum and sells it at its 750 locations.

The Painted Pretzel, chocolate-covered pretzels

Airdate: Feb. 24, 2012Deal: $100,000 for a 25 percent stake from Cuban, who sells them at his Landmark Theatres chain.Result: Sales higher in the past six months than in the past 4.5 years combined.

ReadeRest, magnetic reading-glasses holder

Airdate: Feb. 24, 2012Deal: Greiner paid $150,000 for a 65 percent stake and took the product to QVC.Result: More than $3.5 million in sales and climbing.

Kisstixx, lip balm for couples

Image credit:
Kisstixx

Airdate: March 2, 2012Deal: Cuban paid $200,000 for a 40 percent stake (after the founders got Corcoran and O'Leary to smooch).Result: Sales on track to pass $1 million in 2012.